Rear portion of an automobile



FIG. 1 is a left, front perspective view of a rear portion of an automobile of our new design;

FIG. 2 is a left, rear perspective view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof; and,

FIG. 6 is a top plan view thereof.

The portion of the vehicle in light contrast is environment and is not a part of the claimed design. Our design includes the mirror image of the embodiment depicted. 

The ornamental design for a rear portion of an automobile, as shown and described. 